It’s new beginnings and life changing moments in the season three premiere of Ladies of London. Julie Montagu and her husband Luke officially take over his family estate, Mapperton, and the responsibilities of its 400 year legacy. Meanwhile, Marissa is pregnant with her third child, but the birth is far from a joyous event due to a life threatening condition. Caroline Fleming struggles to balance home life as she has to travel to Denmark weekly to spend time with her sick father. While, Sophie, Caroline's sister-in-law, finds herself caught in the middle of a feud between Julie and Caroline Stanbury.